/Engine/Source/Runtime/GeometryCore/Public/Generators/MarchingCubes.h
Root-find the intersection along edge from f(P1)=ValP1 to f(P2)=ValP2
void find_iso ( const [TVector](API\Runtime\Core\Math\TVector)< double > & P1, const [TVector](API\Runtime\Core\Math\TVector)< double > & P2, double ValP1, double ValP2, [TVector](API\Runtime\Core\Math\TVector)< double > & PIso )